BJT & Bipolar Transistors

A Bipolar Transistor or BJT (Bipolar Junction Transistor) is a solid state, three-pin device made from three layers of silicon. A BJT is designed to amplify current, bipolar transistors can also function as a switch. There are two main types of transistor, PNP (positive negative positive) or NPN (negative positive negative).
How a Bipolar transistor is made
A bipolar transistor is made by joining two signal diodes back to back creating two PN junctions connected in series, sharing a common P or N terminal. By nature, silicon does not normally conduct electricity well. However, when silicon is treated with certain chemicals or impurities we can make the material and electrons behave in a different way. This process is called doping. The doping process improves the semiconductors ability to conduct electricity.
What does a bipolar transistor do?
As we said before a bipolar transistor has two possible functions, switching, and amplification. Due to the devices three layers of doped semiconductor material, supplying the transistor with a signal voltage enables the discrete component to act as an insulator or a conductor. This clever change provides the transistors with two basic functions, switching (digital) electronics or amplification (analog) electronics.
Types of transistor
Transistors are available in panel, surface and through hole mounting options in plastic package or metal can versions. All have three terminals or pins, the Base, the Collector, and the Emitter.
Where are bipolar transistors used?
Transistors are one of the most widely used discrete components in electronic designs and circuits. Transistors are used for the amplification of all types of electrical signals in circuits made up of individual components rather than ICs (integrated circuits).

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Beskrivning Pris Transistor Type Maximum DC Collector Current Maximum Collector Emitter Voltage Package Type Mounting Type Maximum Power Dissipation Minimum DC Current Gain Transistor Configuration Maximum Collector Base Voltage Maximum Emitter Base Voltage Maximum Operating Frequency Pin Count Number of Elements per Chip Automotive Standard
RS-artikelnummer 922-7835
Tillv. art.nrFMMT491ATA
VarumärkeDiodesZetex
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NPN 1 A 40 V SOT-23 Surface Mount 500 mW 35 Single 40 V 5 V 150 MHz 3 1 -
RS-artikelnummer 922-7702
Tillv. art.nrFZT653TA
VarumärkeDiodesZetex
2,735 kr
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NPN 2 A 100 V SOT-223 Surface Mount 2 W 25 Single 120 V 5 V 175 MHz 3 + Tab 1 -
RS-artikelnummer 843-1575
Tillv. art.nr2N3904BU
VarumärkeON Semiconductor
1,253 kr
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NPN 200 mA 40 V TO-92 Through Hole 625 mW 100 Single 60 V 6 V 100 MHz 3 1 -
RS-artikelnummer 168-6815
Tillv. art.nrMJE340
VarumärkeSTMicroelectronics
4,459 kr
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NPN 500 mA 300 V SOT-32 Through Hole 2.8 W 30 Single 300 V 3 V - 3 1 -
RS-artikelnummer 544-9680
Tillv. art.nrMJE15030G
VarumärkeON Semiconductor
13,65 kr
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NPN 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS-artikelnummer 170-4150
Tillv. art.nrBC337-40 A1
0,372 kr
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NPN 800 mA 45 V TO-92 Through Hole 625 mW 250 Single 50 V 5 V - 3 1 -
RS-artikelnummer 774-3212
Tillv. art.nr2N3055AG
VarumärkeON Semiconductor
54,08 kr
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NPN 15 A 60 V TO-204AA Through Hole 115 W 5 Single 100 V 7 V 1 MHz 2 1 -
RS-artikelnummer 823-1791
Tillv. art.nrZDT1049TA
VarumärkeDiodesZetex
14,042 kr
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NPN 5 A 25 V SM Surface Mount 2.75 W 1200 Isolated 80 V 5 V 180 MHz 8 2 -
RS-artikelnummer 796-9710
Tillv. art.nrBC548A A1
1,344 kr
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NPN 100 mA 30 V TO-92 Through Hole 500 mW 110 Single 30 V 6 V - 3 1 -
RS-artikelnummer 102-4109
Tillv. art.nr2STD1665T4
VarumärkeSTMicroelectronics
3,25 kr
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NPN 6 A 65 V DPAK (TO-252) Surface Mount 15 W 30 Single 150 V 7 V - 3 1 -
RS-artikelnummer 165-9829
Tillv. art.nrPMBT3904M,315
VarumärkeNexperia
0,222 kr
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NPN 200 mA 40 V SOT-883 Surface Mount 590 mW 30 Single 60 V 6 V 100 MHz 3 1 -
RS-artikelnummer 169-8610
Tillv. art.nrBC547BTF
VarumärkeON Semiconductor
0,357 kr
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NPN 100 mA 45 V TO-92 Through Hole 500 mW 110 Single 50 V 6 V 1 MHz 3 1 -
RS-artikelnummer 103-2936
Tillv. art.nrMJE15031G
VarumärkeON Semiconductor
11,862 kr
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PNP 8 A 150 V TO-220AB Through Hole 50 W 20 Single 150 V 5 V 30 MHz 3 1 -
RS-artikelnummer 544-9696
Tillv. art.nrMJ15022G
VarumärkeON Semiconductor
75,69 kr
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NPN 16 A 200 V TO-204 Through Hole 250 W 5 Single 350 V 5 V 4 MHz 3 1 -
RS-artikelnummer 545-0062
Tillv. art.nrBD180G
VarumärkeON Semiconductor
5,79 kr
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PNP 1 A 80 V TO-225 Through Hole 30 W 15 Single 80 V 5 V 3 MHz 3 1 -
RS-artikelnummer 890-2620
Tillv. art.nr2SA1943N(S1,E,S)
VarumärkeToshiba
21,632 kr
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PNP 15 A 230 V TO-3P Through Hole 150 W 35 Single -230 V -5 V - 3 1 -
RS-artikelnummer 544-9270
Tillv. art.nr2N3773G
VarumärkeON Semiconductor
59,46 kr
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NPN 16 A 140 V TO-204 Through Hole 150 W 5 Single 160 V 7 V - 3 1 -
RS-artikelnummer 274-885
Tillv. art.nrFMMT493TA
VarumärkeDiodesZetex
3,081 kr
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NPN 1 A 100 V SOT-23 Surface Mount 500 mW 20 Single 120 V 5 V 150 MHz 3 1 -
RS-artikelnummer 178-7574
Tillv. art.nrBC846ALT1G
VarumärkeON Semiconductor
0,176 kr
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RS-artikelnummer 169-7422
Tillv. art.nrZDT1049TA
VarumärkeDiodesZetex
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NPN 5 A 25 V SM Surface Mount 2.75 W 1200 Isolated 80 V 5 V 180 MHz 8 2 -
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